#! /bin/sh
used=`free -m | awk 'NR==2' | awk '{print $3}'`
free=`free -m | awk 'NR==2' | awk '{print $4}'`
echo "===========================" >> /var/log/mem.log
date >> /var/log/mem.log
echo "Memory usage before | [Use：${used}MB][Free：${free}MB]" >> /var/log/mem.log
if [ $free -le 12000 ] ; then
  sync && echo 1 > /proc/sys/vm/drop_caches
  used_ok=`free -m | awk 'NR==2' | awk '{print $3}'`
  free_ok=`free -m | awk 'NR==2' | awk '{print $4}'`
  echo "Memory usage after | [Use：${used_ok}MB][Free：${free_ok}MB]" >> /var/log/mem.log
  echo "OK" >> /var/log/mem.log
else
  echo "Not required" >> /var/log/mem.log
fi
exit 1
